35 Ill. Adm. Code 602.415
Required Permit Modification
Section 602.415 Required Permit
Modification
After any Algicide Permit is
issued, and before the permit expires, if there is any major change either in
the operation of the community water supply or in algae growth that affects the
use of the algicide, copper sulfate, copper sulfate based products, or copper
sulfate chemical aids, as outlined in the permit, the community water supply
must submit an application for modification of its permit. This application
must contain all the information required by Section 602.405.